/**
 * Copyright 2011 Joao Miguel Pereira
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package eu.jpereira.trainings.designpatterns.structural.composite.model;

import java.util.*;


/**
 * @author Joao Pereira
 * 
 */
public abstract class CompositeShape extends Shape {

        List<Shape> shapes;

        public CompositeShape() {
                this.shapes = createShapesList();
        }

        public CompositeShape asComposite() {
                return this;
        }
        
        /**
         * Remove a shape from this shape childrens
         * 
         * @param shape
         *            the shape to remove
         * @return true if the shape was present and was removed, false if the shape
         *         was not present
         */
        public boolean removeShape(Shape shape) {
                shapes.remove(shape);
                return true;

        }

        /**
         * Return the total shapes count in case this is a composite
         * 
         * @return the total count of shapes if the shape is composite. -1 otherwise
         */
        public int getShapeCount() {
                // TODO: implement
                
                return shapes.size();

        }

        /**
         * Add a shape to this shape.
         * 
         * @param shape
         *            The shape to add
         * @throws ShapeDoesNotSupportChildren
         *             if this shape is not a composite
         */
        public void addShape(Shape shape) {
                shapes.add(shape);
                // TODO: Implement
        }

        public List<Shape> getShapes() {
                // TODO: Implement
                return shapes;

        }

        /**
         * @param circle
         * @return
         */
        public List<Shape> getShapesByType(ShapeType circle) {
                List<Shape> circles = new ArrayList<Shape>();
                for(int i=0; i<shapes.size(); i++)
                {
                        if(shapes.get(i).getType()==circle) circles.add(shapes.get(i));
                }
                return circles;
                // TODO: Implement
        }

        /**
         * Return all shapes that are leafs in the tree
         * 
         * @return
         */
        public List<Shape> getLeafShapes() {
                // TODO: Implement
                return shapes;
        }

        /**
         * Factory method for the list of children of this shape
         * 
         * @return
         */
        protected List<Shape> createShapesList() {
                return new ArrayList<Shape>();
                // TODO: Implement
        }
}